Barco Prometheus I, Safety & Instruction Manual

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12. Convergence
Image 12-6
Convergence test pattern
Work Instructions:
• GREEN and RED DMD’s are to be adjusted with reference to the BLUE dmd.
• Each adjustment allows for approximately 10 pixels (for 2K projectors) or 20 pixels (for 4K projectors) maximum displacement
to either side of the nominal BLUE position
• Rotation is limited to approxi/- 5pixels on the left screen fl ank and +/- 5 pixels on the right screen fl ank
• One turn of an adjustment screw relates to an approx. 5-pixel displacement on the screen.
• Let the projector warming up for 30 minutes, while projecting the convergence test pattern, before starting to adjust the conver-
gence.
Take Care:
• In rare cases it can happen that the nominal dmd position falls within a dead zone , where the mechanism changes from a
pushing to a pulling function. This dead zone is due to inherent tolerances within the mechanism. Approximately 2 turns are
required to get out of the dead zone. If it so happens that the nominal position of an adjustment falls within this dead zone,
it is preferable to continue screwing through the dead zone for another 2 turns. Then return to the required nominal position.
The dead zone should now be displaced away from the required end position. The DMD is now securely held in the nominal
position.
• Each adjustment is limited to approximately 10 pixels (for 2K projectors) or 20 pixels (for 4K projectors) displacement. DO NOT
try to force the adjustment beyond this point. The system has an end of travel in both directions, but with excessive force one
could cause damage.
162 R5905963 PROMETHEUS SERIES 09/03/2015